Combined coal and gas range.



G. w CLARK.

COMBINED COAL AND, GAS RANGE.

APPLICATION FI LED FEB. 12, I914.

Patented July 18, 1916.

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APPISICATION FILED FEB. 12- I914.

' Patented July 18, 1916.

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' v IIUQNW GEORGE W. CLARK, OF CHICAGO, ILLINOIS.

COMBINED COAL AND GAS RANGE.

To all whom it may concern Be it knownthat T, GEORGE W. CLARK, a citizenof the United States, residing at Chicago, county of Cook, State of Illinois, have invented a certain new and useful Improvement in Combined Coal and Gas Ranges, and declare the following to be afull, clear, and exact description of the same, such as will-enable others skilled in the art to which it pertains to make and use the same, re ference being had to the accompanying drawings, which form a part of this specification.

The present invention has for its object to produce simple attachments to an ordinary coal stove orrange'by means of which it is possible to cook, broil or bake with gas as the fuel without interfering in any.

way with the ordinary use of the stove or range when coal is used as the fuel.

The various features of novelty whereby my invention is characterized will hereinafter he pointed out with particularity in the claims; but, for a full understanding of my invention and of its object and advantages, reference may be had to'the follow-' ing detailed description taken in connection with the accompanying drawings, wherein:

Figure 1 is a front View ofa range equipped in accordance with the present invention and ready for use as a gas range; Fig. 2 is a section taken approximately on line 22 of Fig. 1, but on a somewhatlarger scale than Fig.1; Fig. 3 is a section taken approximately on line 33 of'Fig. 2; and Fig. 1. is a section taken approximately on line4h4 of Fig.3.

In accordance with one feature of my invention, by means of which it is possible to cook with gas upon the top of-the range, 1

cooking holes containing burners," (notshown) to which gas is supplied through a pipe, 4, lying along the front of the-extension and provided with suitable valves, 5. In the front bracket, 3, is a suitable shallow drawer or tray, 6. This arrangement makes the gas holes independent of the holes intended to receive utensils adapted to be heated from the coal fire; permits 'both 4 coal and gas to be usedsimultaneously or either to be used alone; and at the same Specification of Letters Patent.

Patented July 18, rate.

Application filed February 12, 1914. Serial No. 818,202.

time adds only slightly to the width of the range.

The principal feature of my invention,

not to'lose in efficiency and efiectiveness when the oven is heated from a coal fire. In accordance with my invention, the oven and the'draft passages. or' heating passages associated therewith are left unchanged, the gas appliances being simply attachments which are placed within the usual oven when the latter is to be heated with gas and are removed from the oven and leave .the oven and 8 the usual oven door provided at the bottom with hinges, 9. In accord-' ance with my invention, I place on the front of the range, just below the oven door, a gas supply pipe, 10, terminating at about the middle of the door.

11 is a suitable burner adapted to be laid upon the floor of the oven and provided with a neck or extension, 12, which is adapted to project through the oven opening and engage with the end of the supply pipe 10; the endof the supply pipe 10 and the ad-' j acentv end of the extension or neck, 12, being so shaped that when the two are simply brought in contact with each other they produce a sufliciently tight joint to prevent the escape of gas. In order to permit the neck or extension 12 to project out of the front of the oven, I cut in'the bottom of the oven door an opening, 13, which is controlled by a small auxiliary door, '14, hinged within the-main door, -(which is illustrated auxiliary, door is hinged to the main door at a point above the opening 13, as indicated at 15s0 that when the oven door is oven door is open, the burner may be slipped as being hollow, as is customary). The

- -I prefer'to place over the burner a suitable" into the oven and its neck or extension air to the gas burner, in order to support combustion properly, and therefore I make the opening 13 in the oven door larger than the cross sectional area of the extension 12 in order to permit air to flow into theoven when the burner is in place. It is of course not desirable that the cold air be allowedto flow freely into any part of the oven because its only purpose is tosupply the oxygen necessary for combustion and therefore I provide the burner with wings, 16, projecting laterally and downwardly therefrom throughout substantially its entire length; the burner with its wings forming an inverted trough extending along the bottom of the oven and confining the air entering. the opening 13 so that the only outlet for the latter after entering the opening in the oven door is through suitable openings provided in the burner device whereby the air is permitted to enter the combustion zone. The

burner itself may take various forms, but I,

have obtained very satisfactory results from a burner made in the form of an elongated narrow 0. This is in effect a long double burner having between the two members thereof a long narrow passage which constitutes the outlet for the incoming air and compels this air; to enter the combustion zone.

Since the heat of the burner flame is concentrated in a comparatively narrow zone,

flame spreader, 17, which is somewhat smaller than the corresponding transverse dimensions of the oven so as to permit the gaseous productsof combustion to flow un-' derneath the same and up past its edges; the flame spreader forming the effective bottom of the oven when heated with gas. The

flame spreader may be supported on suitable ledges or rests, 18, at the sides of the oven or it may be connected to the burner in such a way as to make the burner and the spreader a slngle attachment to be placed in the oven. In the arrangement shown, there are several arms, 19, extending upwardly from theouter edges of the burner wings 16 and secured to the flame spreader. These arms do not interfere with the free flow of the gaseous combustion products from the burner and at the same time connect the burner and the spreader together so that they may be placed in the oven and removed therefrom as a. single piece.

It is desirable that the combustion gases when,

be allowed to escape from the oven when the latter is being heated bymeans of the burner, without permitting the combustion gases to enter the room in which the range is located. I have therefore provided a disch'arge outlet leading from the oven to the main flue 21, the outlet being controlled by a means of which the oven and the smoke flue are placed in communication with each other. Controllin this outlet is a hinged damper, 23, whicfi tends always to swing down under the action of gravity and close the outlet. preferably in a vertical groove or depression,

24, formed in-the wall, is a vertically slid On the rear wall of the oven,

able rod or bar, 25, whose upper end is adapted to engage with the under side of the damper-and whose lower end is adapted to 'be engaged by some. portion of the oven.

burnerattach nent; whereby, when the oven burner attachment is placed in the oven, the rod or bar 25 is raised and the damper 23 is opened, while, upon removing the burner attachment, the rod or bar is allowed to drop and the damper to close. Thus the damper will always be open when the burner is in place, "and therefore. the combustion gases and, in case the flame should be extlnguished while the gas is still flowing, then the escaping gas, will always be carried up the chimney and will not pass out into the f room in which the range is located; On the other hand, whenever the burner is removed,

the damper will automatically close so that none of the heat of the ovenwill be lost on account of this opening when the coal fire is being employed.

The damper-operating rod or bar may be actuated in any suitable way, from the burner attachment. In the arrangement shown, I have connected to the rear end of the oven burner a finger, 26, so shaped that when the rod or bar 25 is down, the end of the finger may be inserted beneath it when the burner is placed in the oven with its front end raised, and will thereafter lift the actuating rod or bar when the front end of the burner is lowered.

If desired, there may be placed'in the top of the oven a shallow auxiliary flue, 27, into which the combustion products must pass before they can reach the discharge outlet 22. In the arrangement shown, the flue 27 consists of a narrow flanged plate havin its flanges resting against the under side 0 the top wall of the stove, the plate having numerous perforations, 28, therethrough for order not to decrease the height of the oven on account of the auxiliary flue, this member may be made in the form of a drawer supported upon suitable ledges or rests, 29, projecting downwardly from the top wall of the oven. When the oven burner is put in place, the auxiliary flue may also be slipped in position, the flue being removed when the burner is taken out and leaving the upper portion of the oven without any obstruction."

Projecting inwardly from the wallsof the oven at some distance above the plane of the top of the flame spreader when the latter is in position in the stove, are rests or ledges, 30, upon which may be seated a plate, 31, preferably of such dimensions that it will extend completely across the oven in both transverse directions. The

plate, 31, is provided with openings, 32, ex-

tending through the same. When the plate 31 is in position the combustion gases flowing up around the flame' spreader 17 must flow inwardly beneath the plate 31 until they reach the holes 32, thus permitting the heat from the burner to be concentrated between the flame spreader and the plate 31. The plate 31 has downwardly-projecting members provided with inwardly-extending ledges, 33, upon which a broiling pan may be set. Byusing the plate 31, food may be broiled in the s ace between it and the flame spreader an thus make itunnecessary to employ a separate broiling burner.

In the base of the range I place a long,

narrow door, 35, through which the burner,

the plate 31 and the flue 27 may be passed so as to house them in the base of the range when they are not in use. For the purpose ,of supporting therattachments in the, base of the range I place several transverse rods within the base, the rods being so disposed that the attachments may be laid thereon' The rods are preferably supported loosely as, for example, in suitable seats, 37, so that they may be lifted out and cleaned when .occasion requires.

While have illustrated and described with particularity only a single preferred limited to the exact structural details thus illustrated and described, but intend to cover all forms and arrangements which come within the terms employed in the definitions of my invention constituting'the appended claims.

I claim:

l. The combination'with the oven of a coal stove provided with a discharge outlet at the upper rear corner, a damper for said outlet, a perforated detachable flue adapted to be set in the upper portion of the oven in front of said damper, a burner adapted to be detachably mounted in the oven, and means controlled by the burner for actuating said damper.

2. The combination with the oven of a coal stove, of an oven door hinged at its lower end, a gas pipe arranged outside of the oven and terminating adj acent' to said door, a burner adapted to be detachably set inthe oven, said burner having an extension adapted to be engaged by the end of said gas pipe, said door having a section removed at its hinged edge to provide an opening for the passage of said extension, and an auxiliary gravity door carried by the main door and adapted to close said openingwhen the So burner is removed.

3.The combination with the oven of a coal stove, of an oven door,-a burner adapted to be detachably set in the. oven, said burner having laterally and downwardly projecting wings forming with the burners an inverted trough adapted to rest at its edges upon the bottom of the oven, said oven door having an opening adapted to register with the front end of said trough, and a burner intake extending from said burner through said opening.

4. The combination with the oven of coal stove, of an oven door, a burner adapted to be detachably set in the oven, said burner having laterally and downwardly projecting. Wings forming with the burner an inverted trough adapted to rest at its edges upon the bottom of the oven, said oven door having an opening adapted to register with the front end of saidtrough, a burner intake extending from said burner through said opening, and an auxiliary door transverse deflector plate extending across detachably supported within. the oven at a short distance above said deflector plate,

said perforated plate having ledges on the under side for engaging with a pan to sup- V port the same. form of my invention, 1 do not desire to be 6. The combination withthe oven of a coal stove, of a burner adapted to be detachably set into the oven, a deflector plate oven, and a second plate detachably supportthe top of the same, and a perforated plate I ed within the oven at a shortdistance above said deflector plate, and means on said sec- 0nd plate for suspending a pan.

7. The combination with the oven of a coal stove, of an oven door hinged at its lower end, a gas pipe arranged outside of the oven and termlnating beneath and adj acent to the door, said door having an opening 'therethrough at its hinged edge adapted to register with the terminal of the gas pipe [when the door is swung down, an auxlllary gravity door carried by the-oven door and adapted to close said opening when the oven door is closed 'and to uncover the pening when the oven door is open, and a burner adapted to be detachably set in the oven and provided with an extension adapted to extend through said opening in the oven door and engage with the terminal of the gas pipe.

8. The combination with the oven of a coal stove, of a burner adapted t6 be detachof the oven, the oven having an opening through one of its walls adapted to register wlth one end of said trough, and a burner intake extending from said burner through said opening.

9. The combination with the oven of a coal stove, of a burner adapted to be detachably set into the oven, said burner having laterally and downwardly projecting wings forming with the burner an inverted trough, a transverse deflector plate secured to the burner and lying at some distance above the same, and means for admitting gas to the burner and air to said inverted trough.

10. In a coal range, an oven, a removable gas burner attachment adapted to be placed in the oven, supporting rods lying horizontally below the bottom of the range for supporting said attachment when the latter is not in use, and a door in the front wall of the range in the plane of said supporting rods.

' In testimony whereof, I sign this specification in the presence of two witnesses.

WM. F. FREUDENREIC-H, RUTH E. ZETTERVALL. 

